Is the issue that compositors don't implement the `screencopy` protocol themselves or use the implementation provided by wlroots?
Ref: https://wayland.app/protocols/wlr-screencopy-unstable-v1
> "Warning! The protocol described in this file is experimental and backward incompatible changes may be made.
and the compositors were there way before 2018, so it's a bit too much to expect them to jump on the protocol.
In general, when your diagnosis to a problem is "the people using my product are all just too lazy to use it right", the problem is almost always that your product is the problem.